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Mad City Labs Inc.
Map2524 Todd Dr.
Madison, WI 53713
United States
Phone: +1 608-298-0855
Fax: +1 608-298-9525

Understand Noise at the Sub-nanometer Level

Author: James F. MacKay Wednesday, February 1, 2023
Every positioner has some level of uncertainty in its position, some slight amount of movement that contributes noise to a measurement. The question is whether that uncertainty - also known as position noise - is tolerable for a given device and a given application. Most manufacturers of nanopositioning systems specify their noise, but for a customer to make an informed decision, they must have some understanding of what that noise specification means. That cannot be expressed in a single value, but should be shown as a spectrum that plots noise over frequency and separates the noise from different axes. Armed with such information, users can be sure they’re getting a low noise, high-precision system that meets their needs.

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